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Abstract <p>The lower part of the Burubaital Formation that encompass the Upper Cambrian and Lower Ordovician cherts in the in the Southwestern Cis-Balkhash of Southern Kazakhstan is enriched in organic detritus. This detritus consists of numerous fecal pellets composed of para- and protoconodont elements, as well as groups of spherical smooth acritarchs, individual acritarchs, and conodont elements. Additionally, there are scattered carbonaceous, finely dispersed organic matter and clots of this matter. These findings indicate the significant contribution of pelagic organisms in the formation of a vertical flow of organic matter from the pelagic zone to the deep-sea bottom and the episode of increased burial of organic matter at the beginning of the Batyrbaian Stage in the Late Cambrian corresponding to the TOCE (Top of Cambrian Excursion) isotopic event.</p>

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Traces of Pelagic Biota in Siliceous Rocks of the Upper Cambrian of the Southern Kazakhstan

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • T. Y. Tolmacheva,
  • A. A. Tretyakov,
  • A. V. Ryasantsev

摘要

Abstract

The lower part of the Burubaital Formation that encompass the Upper Cambrian and Lower Ordovician cherts in the in the Southwestern Cis-Balkhash of Southern Kazakhstan is enriched in organic detritus. This detritus consists of numerous fecal pellets composed of para- and protoconodont elements, as well as groups of spherical smooth acritarchs, individual acritarchs, and conodont elements. Additionally, there are scattered carbonaceous, finely dispersed organic matter and clots of this matter. These findings indicate the significant contribution of pelagic organisms in the formation of a vertical flow of organic matter from the pelagic zone to the deep-sea bottom and the episode of increased burial of organic matter at the beginning of the Batyrbaian Stage in the Late Cambrian corresponding to the TOCE (Top of Cambrian Excursion) isotopic event.